DSRC Weather Sensor Information

The sensors are mounted on the roof of our building and are unshaded. The temperature and RH sensors are mounted on the GSOS swing arm approximately 3 meters above the concrete roof. They are housed in the passively aspirated radiation shield atop the swing arm. On the bottom of the swing arm is the pressure port. The pressure port, developed by the National Data Buoy Center, uses a 5" diameter disk with a tapered edge to minimize the effect of wind.

Below is information about the specific sensors being used. Although the data frequency is 15 seconds for these sensors, the actual data available are 5 minute averages (available every 5 minutes).

8.1 Humidity Sensor Model

: HUMICA H-sensor (pn 16663)

Manufacturer

: Vaisala

Data Frequency

: 15 seconds

Accuracy (% rel h)

: +/-1%(0..90%RH)

: +/-2%(90..100%RH)

Effective Dates

: 28-MAY-1999 - present

8.2 Pressure Sensor Model

: PTB220

Manufacturer

: Vaisala

Data Frequency

: 15 seconds

Accuracy (mbar)

: +/-0.1

Height Diff to GPS (m)

: 0.26

Effective Dates

: 28-MAY-1999 - present

8.3 Temperature Sensor Model

: PT 100 RTD 1/s DIN 43760B

Manufacturer

: Vaisala

Data Frequency

: 15 seconds

Accuracy (deg C)

: +/-0.1 @ 20.0C

Effective Dates

: 28-MAY-1999 - present

Below are images of various sensors on our roof (with links to larger
images). The GSOS housing produces the GSD weather data.

The wind and rain reports are provided by ESRL/GMD (formerly CMDL). The
tipping bucket gauge reports accumulated precipitation from 00Z daily. Due
to building roof regulations, the anemometer is not well sited, and is
heavily influenced by the structure.